树莓派-继电器模块控制实验.md

树莓派-继电器模块控制实验

接线图

树莓派管脚图

代码

C

#include <wiringPi.h>
#include <stdio.h>

#define RelayPin      0

int main(void)
{
	if(wiringPiSetup() == -1){ //when initialize wiring failed,print messageto screen
		printf("setup wiringPi failed !");
		return 1; 
	}
	
	pinMode(RelayPin, OUTPUT);

	while(1){
			digitalWrite(RelayPin, LOW);			
			delay(1000);
			digitalWrite(RelayPin, HIGH);
			delay(1000);
	}

	return 0;
}

编译命令：gcc relay.c -o relay -lwiringPi

Python

#!/usr/bin/env python
import RPi.GPIO as GPIO
import time

RelayPin = 11    # pin11

def setup():
	GPIO.setmode(GPIO.BOARD)       # Numbers GPIOs by physical location
	GPIO.setup(RelayPin, GPIO.OUT)
	GPIO.output(RelayPin, GPIO.HIGH)

def loop():
	while True:
		print '...relayd on'
		GPIO.output(RelayPin, GPIO.LOW)
		time.sleep(0.5)
		print 'relay off...'
		GPIO.output(RelayPin, GPIO.HIGH)
		time.sleep(0.5)

def destroy():
	GPIO.output(RelayPin, GPIO.HIGH)
	GPIO.cleanup()                     # Release resource

if __name__ == '__main__':     # Program start from here
	setup()
	try:
		loop()
	except KeyboardInterrupt:  # When 'Ctrl+C' is pressed, the child program destroy() will be  executed.
		destroy()